Loading provider…
Loading provider…
Gastroenterology Physician in Glenview, IL
NPI: 1255313367Primary Employer
Illinois Gastroenterology Group, LLC
gialliance.com
HQ Phone
Get MD Douglas's Phone Numberphone_androidMobile
Get MD Douglas's MobileLooking to connect with more Physicians?
Dmand AI gives you access to real-time firmographics, buying signals, org charts, and decision-makers - helping your GTM teams prioritize accounts, personalize outreach with AI-driven automation, and close deals faster.
Get Started for Freearrow_outwardIL State Medical License
IL State Medical License
1980 - 2026
WI State Medical License
1982 - 2017

American Board of Internal Medicine
Internal Medicine

American Board of Internal Medicine
Gastroenterology
Northwestern Memorial Hospital
1979 - 1982
Medical College Of Wisconsin
mcw.edu
Fellowship • Gastroenterology
1982 - 1984
Ohio State College of Medicine
medicine.osu.edu
Medical School
Until 1979
| # | Procedure Code (CPT®/HCPCS II) | Procedure Patients | Procedure Volume |
|---|---|---|---|
| 1 | 99214Established patient office or other outpatient visit, 30-39 minutes | 127 | 176 |
| 2 | 43239Biopsy of the esophagus, stomach, and/or upper small bowel using an endoscope | 83 | 84 |
| 3 | 45380Biopsy of the large bowel using an endoscope (colonoscopy) | 75 | 75 |
| 4 | 99213Established patient office or other outpatient visit, typically 15 minutes | 75 | 90 |
| 5 | 99204New patient office or other outpatient visit, 45-59 minutes | 75 | 75 |
Efficacy of anti-tumor necrosis factor therapy in patients with ulcerative colitis.
Authors: David Katzka
Publication Date: 2002-10